Upper lamp blinking twice — Indoor coil or room temperature thermistor issue

What does Upper lamp blinks 2-time blink 2.5-second OFF mean?

This blinking pattern means the indoor coil or room temperature thermistor is experiencing a short or open circuit. The unit will not operate.

• Indoor coil thermistor short circuit
• Indoor coil thermistor open circuit
• Room temperature thermistor short circuit
• Room temperature thermistor open circuit

Click steps to track your progress.

1. 1

   Refer to the characteristics of the indoor coil thermistor and room temperature thermistor.

2. 2

   Check if the thermistors are properly connected.

3. 3

   Replace faulty thermistor(s) if identified.